A little bit of moisture will ruin the tips in about 2 seconds. replacement parts $ 200 for my esab $ 2 k plasma. I bought a motorguard cartridge filter then the clear plastic ones that change color when they are used up. There is a tip here on Hr about using kitty litter and an old propane tank to make a large desicant dryer. I got rid of all my old obsolete propane tanks a couple years ago.